Power tire-pump.



H. D. WATBRHOUSE.

POWER TIRE PUMP.

APPLICATION FILED JUNE 21. 1910.

Patented Nov. 29, 1910.

@Hoang 7 tra srarns HAROLD D. WATERHOUSE, OF WOLLASTON, MAS'ACHUSETTS..

POWER TIRE-PUMP.

To all whom it may concern:

. Be it known that I, HAROLD D. WATER- HoUsE, a citizen of the United States, residing at Wollaston, in the county of Norfolk and State of Massachusetts, have invented certain new and useful Improvements Ain Power Tire-Pumps; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to power tire pumps and has for its object the production of a pump which will utilize the gases from an automobile motor to pump up the tires of the machine, and will at the same time pre- `ventsaid gases from entering the tire. In

other words, this invention provides a means for readily, cheaply and quickly intlating tires with fresh air at all times, and at the same time will prevent grease and other deleterious substances found in motor cylinder gases from entering the tire.

To these ends,`the invention consists in the novel details of construction and combinations of parts more fully hereinafter disclosed and particularly pointed out in the claims.

Referring to the accompanying drawings forming a part of this specification and in which like numerals refer to'like parts in all the views, Figure I is a diagrammatic view, partly broken away, showing the application of my pump to the wheel of an automobile; and,'Fig. 2, is an enlarged sectional view of the pump detached from the motor cylinder.

l indicatesI any suitable cylinder, preferably provided with the radiating ridges or projections 2, and with lugs or other means 3, for securing 'the cylinderto the dashboard 4, or other portion of the automobile This cylinder is provided with a port G,

adapted to be connected as by the pipe 7 to the cylinder' 8, of the engine 9, and this pipe 7 is preferably provided with a valve l0, as indicated.

The cylinder l, carries a piston 1l, which, as shown, is devoid of piston rods, and, therefore, I term the same a Ifloating piston, and-the bore 12 of the cylinder extends somewhat beyond the port. G as'indicated at 13, in order that the piston may have a cushioned stroke. By extending the bore 12, however, the piston is liable to be sucked up beyond the port 6, and to close the same.

Specification of Chatters Patent. I Patented Nov. 29, 1910.

f t. Application filed June 27, 1.910. Serial No. 569,220. 1

In order to obviate these disadvantages, I provide. the by-pass 14 which enters the port 6, out-side of the cylinder, as shown, and which enters the cylinder at its extreme end, as indicated at 15. The by-pass 14 is provided with a valve 16 preferably of the ball type which may be conveniently controlled as by the spring 17. A convenient way of supportin the. valve is by the cage 18. The other en of the cylinder'l is provided with the valve 20, preferablyof the form of a check valve, which controls the port 2l which admits fresh air intoy the cylinder on the side of the piston opposite to that on which the engine gases exhaust.

A port 22 is also located at a distance from port is preferably provided with a Valve 23 of the ball type which may be conveniently controlled by a spring 2st., also carried by a cage 25 similar to the caffe 1S. Connected with the port 22 is the pipe 26, adapted to convey the air to the tire 27, and to be connected and disconnected therefrom as by the usual means 28.

The operation of my invention is as follows :,-Vlflhcn it is desired to inate the tire, the pipe 2G is connected by the means 28 to the tire 27, and the valve l0 is opened. The engine being started, the combustion gases from the saine enter the port 6 and force the floating piston Il toward the valve 20. This, in turn, causes any air which may be in the cylinder on the opposite side of the piston to be forced out of the port 22,

and through the pipe 26 into the tire. Upon ,the occurrence of the intake stroke of the en- `gine, a vacuum of course is formed in the cylinder' l, and the pressure of the atmosphere will cause the valve 20 to unseat, while the piston ll will be thrown'to that. end of the cylinder at which the port 6 is located. Upon the next compression and 'expansion strokes of the engine taking place, -the said piston 1I will be again forced to the opposite end of the cylinder, thereby causing the valve 2O to seat, the valve 23 to unseat, and an additional supply of air to 'be forced into the tire.

Should the suction to which the float-ing piston Il is subjected cause the same to pass beyond the port 6 and thereby close the latter, then upon the next compressive stroke, the gases enteringl the by-pass 14, will cause the valve ltto unseat, and said gases enter- .ing the outlet i5, Will 'orcetliepiston ll past tlie port 6, thereby uncovering the saine, and the otlier portions of the Colnpressed gases will complete the stroke as It will thus be seen that by the simple expedient of employing' a, floating piston in Connection with 'the construction above disclosed, l ani enabled at alltinies to prevent any grease or other 'deleterious substances entering the tire, and yet at the same time am enabled readily to eliieiently and inexpensively pump up the tire from tbe motor, at will. ln other Words, I prevent tile gases and ail-'from mixing, While at the same time, l utilize the air compressed by said gases to inflate the tire.

It is obvious that those skilled in the art may vary the details oi construction and arrangement of parts Without departing from the spirit of iny invention, and therefore, l do not wisli to be limited to said features except as may be required by tlie claims.

lt also obvious that the use of my invei'ition is not eonnned to tires, for it may be used on motor boats and wherever it is desired to provide a Supply of fresh air un-y willi said port and said cylinder, a. port at the other end of said pump cylinder adapted to be eonneeted to the tire to be inflated, and a i'nlved port adapted to admit air into said pump cylinder, substantially as described.

ln a power tire pump, the con'ibinat-ion ell a cylinder, a port at one end 'adapted to coinnninieaie with the eliamber of an engine cylinder and to admit the gases into said pump cyiiiuler, a port at the other end et' said pump rjii'i'ider adapted to be Connected with a tire to be inflated, a by-pass leading :from said lirst mentioned port to said cylinder, a valve adapted to admit air into said cylinder, a Valve adapted te admit air into said 'pump cyl; ider, and a Afielding piston in said pump cyl adapted to prevent said air and gases from niixiir subslantially as described.

ln-apower tire pump, tbe combination elVx a cylinder, a port at one end of said eylinder aeapted to admit tbe ooinbnstion gases from an engine into said eylinder, n piston adapted to be subjected to the pressure of said gases on one face during` the com pressive stroke of the engine, and to eiose said port during the suetion stroke thereof, a by-pass connected to said port and adapted to deliver said gases to said piston, a valve adapted to admit air to the other face et' said piston and a valved port adapted, to connecty with the tire to be inflated, substantially as described. l

4. In a power tire pump, the combination of a cylinder means t-o eecure the same to an automobile, means to radiate tl'ie beat generated in said cylinder, e doatingpiaton in said cylinder, a Vportto admit tbe combustion gases of an engine to one side ot' said piston and adapted to be closed by said ton; a i'alved by-pass connected to said port, and entering said cylinder; connections be-v` tween said cylinder and said engine, and valved connections on the other side of' said piston between said cylinder and the tire te be inliated, substantially as described.

5. in a power tire punilo, tbe combination;

of a eylinder, a doating piston in seid cylin-A der, a port located away from the extreme end of said cylinder and adapted to admit gases from the combustion `elianfiber of an engine into said cylinder on one side of Saidv piston, a valved by-passconnecting; said port `and the extreme end o said cylinder adapted to deliver combustion gases en the saine side of said piston as said port, a clieeln valve in the extreme other end of said c vlin-N der adapted to deliver air on the other side of said piston, and a vali/'ed port| on said laetQ mentioned side of Said piston adapted to de-` liver seid air to t-lie 'tire to be inflated, substantially described.

6. in e power tire pump, the Combination oi a cylinder; ay floating piston tliereinyan inlet port entering' the side of said cyiinfler 100 to torina cushioning; space for said piston between said port and tlie extreme end-net said eylinderge valved ivy-pass between said portand said cylinder end; a. rained port for air at die extreme other end said oylinder; and an exit port for air entei' ff tbe side of said cylinder leaving a euslnouing.

space for said pistonbetneen said air inlet port` and said air exit port, Substantially as described.

In testimony whereof, I aliix my ture, in presence of two witnesses'.

HARG) l). i/HiiTEttQSlil Wvitnesses: I

E. iii. FULLER, Y W'iLIAM il?. l-nL. 

